Hello,
When a patch lands and causes a performance regression in our performance tests, authors are notified through a regression bug and are asked to begin investigating within 3 days in accordance with the
Mozilla Performance Regression Policy. Progress on the investigation is then monitored through a combination of Bugbot needinfos and manual Performance Sheriff intervention. You can find an outline of this monitoring process
here.
At the moment, our Bugbot rule for needinfo'ing patch authors on inactive performance regressions only triggers after 7 days of inactivity. To better align with our official regression policy, we will be increasing this frequency to 3 business days of inactivity which will also result in more frequent Performance Sheriff interventions. This change will happen within the next week.
Cheers,
Greg